102791663057 has 4 divisors (see below), whose sum is σ = 102794653236. Its totient is φ = 102788672880.

The previous prime is 102791663047. The next prime is 102791663059. The reversal of 102791663057 is 750366197201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750366197201 = 59 ⋅12718071139.

It can be written as a sum of positive squares in 2 ways, for example, as 54020915776 + 48770747281 = 232424^2 + 220841^2 .

It is a cyclic number.

It is not a de Polignac number, because 102791663057 - 2⁸ = 102791662801 is a prime.

It is a super-2 number, since 2×102791663057² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102791663059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442918 + ... + 1512479.

It is an arithmetic number, because the mean of its divisors is an integer number (25698663309).

Almost surely, 2^102791663057 is an apocalyptic number.

It is an amenable number.

102791663057 is a deficient number, since it is larger than the sum of its proper divisors (2990179).

102791663057 is an equidigital number, since it uses as much as digits as its factorization.

102791663057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990178.

The product of its (nonzero) digits is 476280, while the sum is 47.

The spelling of 102791663057 in words is "one hundred two billion, seven hundred ninety-one million, six hundred sixty-three thousand, fifty-seven".